EP0813000B1 - Mounting method and adjustment of elements of an elastic damping unit - Google Patents

Mounting method and adjustment of elements of an elastic damping unit Download PDF

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Publication number
EP0813000B1
EP0813000B1 EP19970109495 EP97109495A EP0813000B1 EP 0813000 B1 EP0813000 B1 EP 0813000B1 EP 19970109495 EP19970109495 EP 19970109495 EP 97109495 A EP97109495 A EP 97109495A EP 0813000 B1 EP0813000 B1 EP 0813000B1
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EP
European Patent Office
Prior art keywords
abutment
housing
sub
rod
spring
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EP19970109495
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German (de)
French (fr)
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EP0813000A1 (en
Inventor
Didier Duclos
Cesario Soares
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Valeo SE
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Valeo SE
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/133—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses using springs as elastic members, e.g. metallic springs
    • F16F15/134—Wound springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F16F1/123—Attachments or mountings characterised by the ends of the spring being specially adapted, e.g. to form an eye for engagement with a radial insert
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/13142—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses characterised by the method of assembly, production or treatment

Definitions

  • the invention relates to a method of assembling and adjustment of the elements of an elastic damping device forming part of a double damping flywheel; she relates more particularly to an improvement making it possible to better control the assembly parameters of these elements to have increased operational safety of the double steering wheel damper.
  • a double damping flywheel comprising two coaxial rotating masses between which are attached, articulated, elastic damping devices regularly distributed circumferentially.
  • Such devices are oriented globally radially in the double flywheel shock absorber when the two rotating masses are in stable position relative to each other, circumferentially.
  • the angular offsets between the two masses cause an inclination of the elastic devices of damping with respect to their radial directions of rest respective. Therefore the elastic devices are elongated between their points of articulation to the two rotating masses.
  • An elastic damping device comprises a first sub-assembly forming an elongated housing and comprising a first articulation piece for its connection to one of the masses and a second sub-assembly comprising at least one helical spring mounted on a rod fitted with a second part of articulation for its articulation to the other of the masses rotating, this second sub-assembly being partially engaged in the case which houses the spring in particular.
  • This one takes support between a first stop located at one end of the rod, engaged in the housing and a second stopper fixed at the end of the housing opposite to said first articulation part.
  • a double torsional damping flywheel 11 carrying two coaxial rotating masses 12, 13 mounted mobile in rotation relative to each other around a common axis of symmetry axial x-x against elastic damping means 17 comprising a series of elastic damping devices 15 generally radial in orientation.
  • the first mass 12 comprises essentially a plate 14 and the second mass 13 comprises also a plate 16 extending parallel to the plate 12.
  • the plates 14, 16 are made of moldable material, typically made of cast iron, to increase their inertia.
  • the second rotating mass 13 is rotatably mounted on a tubular hub 18 of the first rotating mass 12.
  • This hub is a generally cylindrical part with an x-x axis, here produced in one piece with the tray.
  • Landing means, here a ball bearings 19 are interposed between the outer periphery of the hub 18 and the internal periphery of the second rotating mass 13.
  • the second rotating mass 13 constitutes the plate of reaction of a friction clutch which is not shown.
  • a friction clutch in association with a double damping flywheel of this type, we can for example, refer to document FR-A-2 524 350.
  • the first rotating mass 12 is intended to be connected by screws 20 located at its internal periphery to a drive shaft, not shown, such as the crankshaft of a combustion engine internal of a motor vehicle.
  • the second rotating mass 13 is linked in rotation via the clutch, to the shaft input of a gearbox, not shown, of the vehicle.
  • the first rotating mass 12 carries at its outer periphery a starter ring 22 designed to be driven by the pinion a starter (not shown) of the internal combustion engine of the motor vehicle.
  • the means of depreciation 17 have a plurality of elastic devices damping 15 distributed regularly circumferentially.
  • the various damping devices are arranged globally radially between the two plates 14, 16.
  • Each elastic device 15 contains at least one spring helical 25a housed inside a case 26. More precisely, the elastic device is divided into a first subset 27 forming said housing comprising a first part articulation 29 and a second sub-assembly 30 comprising said spring 25a, mounted on a rod 32 provided with a second part 34.
  • the spring 25a is supported between a first stop 36 located at one end of the rod 32 located inside of the housing 26 and a second stop 38 fixed to one end 39 of the box 26 after assembly of the two sub-assemblies.
  • Said first articulation part 29 forms a sort of ball joint immobilized at one end of the housing 26 by the form of this last. More specifically, the housing 26 is formed from of a sheet bent like a hairpin around said ball joint, with the formation of two longitudinal ribs of stiffening 40.
  • the ball joint has a cylindrical hole 42 which defines an axis of articulation y-y. It is articulated to the first rotating mass 12 by a pin 44 materializing this axis.
  • the pin 44 is located at the outer periphery of the plate 14 while being carried by the latter.
  • the spring 25a is supported between said first stop 36 welded to the end of the rod and said second stop 38 comprising a bearing inside which said rod slides parallel to its longitudinal axis.
  • the second stop 38 is attached to the end 39 of the housing 26 opposite to that which surrounds the kneecap. Outside the case, the second piece articulation 34 is provided with a cylindrical bore forming rotation bearing z-z.
  • a pin 45 riveted to the second mass rotating 13 is engaged in this bearing. Trunnion 45 is implanted on the internal periphery of the second mass 13.
  • Each damping device 15 is thus mounted articulated between the first and second rotating masses 129, 13 between the two axes y-y and z-z.
  • each damping device Due to its structure, each damping device has tendency to bring the two rotating masses 12, 13 in a predetermined relative position for which its length is minimum. Any relative circumferential movement between the two rotating masses, results in an elongation of each elastic device resulting in compression of the springs.
  • each case houses two coaxial springs 25a, 25b of different stiffness.
  • a device friction with axial action 46 is interposed between the two rotating masses and constitutes a hysteresis device. This the latter is not part of the invention and therefore will not described in detail.
  • the invention provides a method of assembling and adjusting the elements of such an elastic damping device allowing to eliminate this risk. This process will now be explained in reference to Figures 4 and 5.
  • the general principle of this process consists in assembling the elements of such an elastic device 15 so that the latter has a predetermined length L between its two axes articulation y-y and z-z, for its maximum possible elongation. In this way, when the rotating masses 12, 13 reach their maximum angular offset, all springs 25a and / or 25b different elastic damping devices are blocked with contiguous turns at the same time, and efforts are found distributed between the various elastic damping devices.
  • said first stop 36 is prefixed, here by welding, to the end of the rod 32.
  • the end of the stop and the end of the housing are flush, that is to say at the same distance dl from the z-z axis.
  • This optimal situation is not always carried out.
  • the stop 52 is more close (distance d2) to the axis z-z as the end of the case, while in the case of FIG. 7, the stop 52 is more distant (distance d3) from the z-z axis as the end of the housing. It is this possibility of axial offset between the stop and the end of the housing which allows, without damaging the weld, to always adjust the distance between the two articulation parts 29, 34 at the desired L value.
  • Figures 8 and 9 show a variant allowing better still master the assembly and adjustment operations.
  • the first stop 36 is secured to the rod 32 during assembly and adjustment of the second sub-assembly 30. More precisely, it maintains the second stop 38 at a predetermined distance do from the second articulation piece 34.
  • the spring is compressed with contiguous turns by sliding the first stop 36 on the rod in the direction of the second stop and said first 55 is fixed by welding stop on the rod. We are then brought back to the previous case which consists to engage the second compressed sub-assembly in the housing and to fix by welding 50 the second stop 38 to the housing 26 after having set the distance between the two articulation pieces to length L predetermined.
  • the housing 26 may have another shape and have a sheath everywhere to secure the first part of articulation.
  • the second stop 38 is then welded to the free end of the sheath affixed to the first articulation part 29.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Operated Clutches (AREA)

Description

L'invention se rapporte à un procédé d'assemblage et de réglage des éléments d'un dispositif élastique d'amortissement entrant dans la constitution d'un double volant amortisseur; elle concerne plus particulièrement un perfectionnement permettant de mieux maítriser les paramètres d'assemblage de ces éléments pour disposer d'une sécurité de fonctionnement accrue du double volant amortisseur.The invention relates to a method of assembling and adjustment of the elements of an elastic damping device forming part of a double damping flywheel; she relates more particularly to an improvement making it possible to better control the assembly parameters of these elements to have increased operational safety of the double steering wheel damper.

On connaít, voir WO-A-94/27062, un double volant amortisseur comprenant deux masses tournantes coaxiales entre lesquelles sont rattachés, de façon articulée, des dispositifs élastiques d'amortissement régulièrement répartis circonférentiellement. De tels dispositifs sont orientés globalement radialement dans le double volant amortisseur lorsque les deux masses tournantes se trouvent en position stable l'une par rapport à l'autre, circonférentiellement. En fonctionnement, les décalages angulaires entre les deux masses entraínent une inclinaison des dispositifs élastiques d'amortissement par rapport à leurs directions radiales de repos respectives. Par conséquent les dispositifs élastiques s'allongent entre leurs points d'articulation aux deux masses tournantes.We know, see WO-A-94/27062, a double damping flywheel comprising two coaxial rotating masses between which are attached, articulated, elastic damping devices regularly distributed circumferentially. Such devices are oriented globally radially in the double flywheel shock absorber when the two rotating masses are in stable position relative to each other, circumferentially. In operation, the angular offsets between the two masses cause an inclination of the elastic devices of damping with respect to their radial directions of rest respective. Therefore the elastic devices are elongated between their points of articulation to the two rotating masses.

Un dispositif élastique d'amortissement comporte un premier sous-ensemble formant un boítier allongé et comprenant une première pièce d'articulation pour sa liaison à l'une des masses tournantes et un second sous-ensemble comprenant au moins un ressort hélicoïdal monté sur une tige munie d'une seconde pièce d'articulation pour son articulation à l'autre des masses tournantes, ce second sous-ensemble étant partiellement engagé dans le boítier qui abrite notamment le ressort. Celui-ci prend appui entre une première butée située à une extrémité de la tige, engagée dans le boítier et une seconde butée fixée à l'extrémité du boítier opposée à ladite première pièce d'articulation.An elastic damping device comprises a first sub-assembly forming an elongated housing and comprising a first articulation piece for its connection to one of the masses and a second sub-assembly comprising at least one helical spring mounted on a rod fitted with a second part of articulation for its articulation to the other of the masses rotating, this second sub-assembly being partially engaged in the case which houses the spring in particular. This one takes support between a first stop located at one end of the rod, engaged in the housing and a second stopper fixed at the end of the housing opposite to said first articulation part.

Par conséquent, l'élongation du dispositif élastique d'amortissement se traduit par une compression du ressort à l'intérieur du boítier. Therefore, the elongation of the elastic device damping results in compression of the spring at inside the case.

Dans des conditions de fonctionnement extrêmes l'élongation des dispositifs d'amortissement peut amener les ressorts à spires jointives. Le couple peut alors se répartir très inégalement entre les différents dispositifs d'amortissement, pouvant entraíner la détérioration de l'un d'eux. L'invention permet d'éviter ce type d'incident.Under extreme operating conditions the elongation damping devices can bring the springs to turns contiguous. The couple can then be distributed very unequally between the various damping devices, which can cause the deterioration of one of them. The invention makes it possible to avoid this type incident.

Conformément à l'invention, ce problème est résolu par la partie caractérisante de la revendication 1.According to the invention, this problem is solved by the characterizing part of claim 1.

Grâce à l'invention, on s'affranchit des tolérances de fabrication des diverses pièces et tous les ressorts viendront à spires jointives en même temps.Thanks to the invention, it overcomes the tolerances of manufacture of various parts and all springs will come to contiguous turns at the same time.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaítront plus clairement à la lumière de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une demi-vue en élévation, en coupe partielle, d'un double volant amortisseur équipé d'organes élastiques d'amortissement concernés par l'invention;
  • la figure 2 est une coupe II-II de la figure 1;
  • la figure 3 est une vue de détail illustrant un organe élastique d'amortissement du double volant amortisseur;
  • la figure 4 représente l'un des sous-ensembles de ce dispositif élastique au cours du procédé de montage et de réglage;
  • la figure 5 illustre la phase terminale de montage et de réglage de l'élément élastique;
  • les figures 6 et 7 sont des vues analogues à la figure 5 illustrant différents cas possibles à l'issue du procédé de montage et de réglage;
  • la figure 8 illustre une variante de montage des éléments du second sous-ensemble; et
  • la figure 9 illustre l'opération finale du procédé selon cette variante.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the description which follows, given solely by way of example and made with reference to the appended drawings in which:
  • Figure 1 is a half elevational view, in partial section, of a double damping flywheel equipped with elastic damping members concerned by the invention;
  • Figure 2 is a section II-II of Figure 1;
  • Figure 3 is a detail view illustrating an elastic damping member of the double damping flywheel;
  • FIG. 4 represents one of the sub-assemblies of this elastic device during the assembly and adjustment process;
  • FIG. 5 illustrates the final phase of mounting and adjusting the elastic element;
  • Figures 6 and 7 are views similar to Figure 5 illustrating different possible cases at the end of the mounting and adjustment process;
  • Figure 8 illustrates an alternative mounting of the elements of the second sub-assembly; and
  • FIG. 9 illustrates the final operation of the method according to this variant.

En se référant plus particulièrement aux figures 1 à 3, on a représenté un double volant amortisseur de torsion 11 portant deux masses tournantes coaxiales 12, 13 montées mobiles en rotation l'une par rapport à l'autre autour d'un axe commun de symétrie axiale x-x à l'encontre de moyens d'amortissement élastiques 17 comportant une série de dispositifs élastiques d'amortissement 15 d'orientation globalement radiale. La première masse 12 comporte essentiellement un plateau 14 et la seconde masse 13 comporte aussi un plateau 16 s'étendant parallèlement au plateau 12.With particular reference to Figures 1 to 3, we have shown a double torsional damping flywheel 11 carrying two coaxial rotating masses 12, 13 mounted mobile in rotation relative to each other around a common axis of symmetry axial x-x against elastic damping means 17 comprising a series of elastic damping devices 15 generally radial in orientation. The first mass 12 comprises essentially a plate 14 and the second mass 13 comprises also a plate 16 extending parallel to the plate 12.

Les plateaux 14, 16 sont en matière moulable, typiquement en fonte, pour augmenter leur inertie.The plates 14, 16 are made of moldable material, typically made of cast iron, to increase their inertia.

La seconde masse tournante 13 est montée à rotation sur un moyeu tubulaire 18 de la première masse tournante 12. Ce moyeu est une pièce de forme générale cylindrique d'axe x-x, ici réalisé d'un seul tenant avec le plateau. Des moyens de palier, ici un roulement à billes 19 sont interposés entre la périphérie externe du moyeu 18 et la périphérie interne de la seconde masse tournante 13.The second rotating mass 13 is rotatably mounted on a tubular hub 18 of the first rotating mass 12. This hub is a generally cylindrical part with an x-x axis, here produced in one piece with the tray. Landing means, here a ball bearings 19 are interposed between the outer periphery of the hub 18 and the internal periphery of the second rotating mass 13.

La seconde masse tournante 13 constitue le plateau de réaction d'un embrayage à friction qui n'est pas représenté. Pour connaítre en détail l'agencement d'un embrayage à friction en association avec un double volant amortisseur de ce type, on peut par exemple se reporter au document FR-A-2 524 350.The second rotating mass 13 constitutes the plate of reaction of a friction clutch which is not shown. For know in detail the arrangement of a friction clutch in association with a double damping flywheel of this type, we can for example, refer to document FR-A-2 524 350.

La première massé tournante 12 est prévue pour être reliée par des vis 20 situées a sa périphérie interne à un arbre menant, non représenté, tel que le vilebrequin d'un moteur à combustion interne d'un véhicule automobile. La seconde masse tournante 13 est liée en rotation par l'intermédiaire de l'embrayage, à l'arbre d'entrée d'une boíte de vitesses, non représentée, du véhicule. La première masse tournante 12 porte à sa périphérie externe une couronne de démarreur 22 prévue pour être entraínée par le pignon d'un démarreur (non représenté) du moteur à combustion interne du véhicule automobile.The first rotating mass 12 is intended to be connected by screws 20 located at its internal periphery to a drive shaft, not shown, such as the crankshaft of a combustion engine internal of a motor vehicle. The second rotating mass 13 is linked in rotation via the clutch, to the shaft input of a gearbox, not shown, of the vehicle. The first rotating mass 12 carries at its outer periphery a starter ring 22 designed to be driven by the pinion a starter (not shown) of the internal combustion engine of the motor vehicle.

Comme indiqué ci-dessus, les moyens d'amortissement élastiques 17 comportent une pluralité de dispositifs élastiques d'amortissement 15 répartis régulièrement circonférentiellement. Les différents dispositifs d'amortissement sont disposés globalement radialement entre les deux plateaux 14, 16.As indicated above, the means of depreciation 17 have a plurality of elastic devices damping 15 distributed regularly circumferentially. The various damping devices are arranged globally radially between the two plates 14, 16.

Chaque dispositif élastique 15 renferme au moins un ressort hélicoïdal 25a logé à l'intérieur d'un boítier 26. Plus précisément, le dispositif élastique se divise en un premier sous-ensemble 27 formant ledit boítier comprenant une première pièce d'articulation 29 et un second sous-ensemble 30 comprenant ledit ressort 25a, monté sur une tige 32 munie d'une seconde pièce d'articulation 34. Le ressort 25a prend appui entre une première butée 36 située à une extrémité de la tige 32 située à l'intérieur du boítier 26 et une seconde butée 38 fixée à une extrémité 39 du boítier 26 après assemblage des deux sous-ensembles.Each elastic device 15 contains at least one spring helical 25a housed inside a case 26. More precisely, the elastic device is divided into a first subset 27 forming said housing comprising a first part articulation 29 and a second sub-assembly 30 comprising said spring 25a, mounted on a rod 32 provided with a second part 34. The spring 25a is supported between a first stop 36 located at one end of the rod 32 located inside of the housing 26 and a second stop 38 fixed to one end 39 of the box 26 after assembly of the two sub-assemblies.

Ladite première pièce d'articulation 29 forme une sorte de rotule immobilisée à une extrémité du boítier 26 par la forme de ce dernier. Plus précisément, le boítier 26 est constitué à partir d'une tôle pliée à la manière d'une épingle à cheveux autour de ladite rotule, avec formation de deux nervures longitudinales de raidissement 40. La rotule comporte un trou cylindrique 42 qui définit un axe d'articulation y-y. Elle est articulée à la première masse tournante 12 par un tourillon 44 matérialisant cet axe. Le tourillon 44 est implanté à la périphérie externe du plateau 14 en étant porté par celui-ci.Said first articulation part 29 forms a sort of ball joint immobilized at one end of the housing 26 by the form of this last. More specifically, the housing 26 is formed from of a sheet bent like a hairpin around said ball joint, with the formation of two longitudinal ribs of stiffening 40. The ball joint has a cylindrical hole 42 which defines an axis of articulation y-y. It is articulated to the first rotating mass 12 by a pin 44 materializing this axis. The pin 44 is located at the outer periphery of the plate 14 while being carried by the latter.

Le ressort 25a prend appui entre ladite première butée 36 soudée à l'extrémité de la tige et ladite seconde butée 38 comportant un palier à l'intérieur duquel ladite tige coulisse parallèlement à son axe longitudinal. La seconde butée 38 est fixée à l'extrémité 39 du boítier 26 opposée à celle qui entoure la rotule. A l'extérieur du boítier, la seconde pièce d'articulation 34 est munie d'un alésage cylindrique formant palier de rotation z-z. Un tourillon 45 riveté à la seconde masse tournante 13 est engagé dans ce palier. Le tourillon 45 est implanté à la périphérie interne de la deuxième masse 13.The spring 25a is supported between said first stop 36 welded to the end of the rod and said second stop 38 comprising a bearing inside which said rod slides parallel to its longitudinal axis. The second stop 38 is attached to the end 39 of the housing 26 opposite to that which surrounds the kneecap. Outside the case, the second piece articulation 34 is provided with a cylindrical bore forming rotation bearing z-z. A pin 45 riveted to the second mass rotating 13 is engaged in this bearing. Trunnion 45 is implanted on the internal periphery of the second mass 13.

Chaque dispositif d'amortissement 15 est ainsi monté articulé entre les première et seconde masses tournantes 129, 13 entre les deux axes y-y et z-z.Each damping device 15 is thus mounted articulated between the first and second rotating masses 129, 13 between the two axes y-y and z-z.

De par sa structure, chaque dispositif d'amortissement a tendance à ramener les deux masses tournantes 12, 13 dans une position relative prédéterminée pour laquelle sa longueur est minimum. Tout mouvement relatif circonférentiel entre les deux masses tournantes, se traduit par un allongement de chaque dispositif élastique aboutissant à la compression des ressorts.Due to its structure, each damping device has tendency to bring the two rotating masses 12, 13 in a predetermined relative position for which its length is minimum. Any relative circumferential movement between the two rotating masses, results in an elongation of each elastic device resulting in compression of the springs.

En fait, comme représenté, chaque boítier abrite deux ressorts coaxiaux 25a, 25b de raideurs différentes. Un dispositif de frottement à action axiale 46 est interposé entre les deux masses tournantes et constitue un dispositif d'hystérésis. Ce dernier ne fait pas partie de l'invention et ne sera donc pas décrit en détail.In fact, as shown, each case houses two coaxial springs 25a, 25b of different stiffness. A device friction with axial action 46 is interposed between the two rotating masses and constitutes a hysteresis device. This the latter is not part of the invention and therefore will not described in detail.

Il ressort de la description qui précède que, si les dispositifs élastiques d'amortissement ne présentent pas tous la même élongation maximum correspondant au serrage à spires jointives des ressorts 25a et/ou 25b, l'un des dispositifs élastiques risque de supporter un effort excessif dans des conditions de fonctionnement extrêmes, c'est-à-dire lorsque le décalage angulaire entre les deux masses tournantes 12, 13 atteint sa valeur maximum.It appears from the foregoing description that, if the elastic shock absorbers do not all have the same maximum elongation corresponding to tightening with turns contiguous with springs 25a and / or 25b, one of the devices elastic may withstand excessive force in extreme operating conditions, i.e. when the angular offset between the two rotating masses 12, 13 reached its maximum value.

L'invention propose un procédé d'assemblage et de réglage des éléments d'un tel dispositif élastique d'amortissement permettant d'éliminer ce risque. Ce procédé va maintenant être explicité en référence aux figures 4 et 5.The invention provides a method of assembling and adjusting the elements of such an elastic damping device allowing to eliminate this risk. This process will now be explained in reference to Figures 4 and 5.

Le principe général de ce procédé consiste à assembler les éléments d'un tel dispositif élastique 15 de façon que ce dernier présente une longueur prédéterminée L entre ses deux axes d'articulation y-y et z-z, pour son élongation maximum possible. De cette façon, lorsque les masses tournantes 12, 13 atteignent leur décalage angulaire maximum, tous les ressorts 25a et/ou 25b des différents dispositifs élastiques d'amortissement se bloquent à spires jointives en même temps, et les efforts se trouvent répartis entre les différents dispositifs élastiques d'amortissement.The general principle of this process consists in assembling the elements of such an elastic device 15 so that the latter has a predetermined length L between its two axes articulation y-y and z-z, for its maximum possible elongation. In this way, when the rotating masses 12, 13 reach their maximum angular offset, all springs 25a and / or 25b different elastic damping devices are blocked with contiguous turns at the same time, and efforts are found distributed between the various elastic damping devices.

Pour ce faire, au moment de l'assemblage des deux sous-ensembles, on comprime les ressorts à spires jointives en rapprochant au maximum les deux butées 36, 38 (figure 4) puis, on place le second sous-ensemble 30 dans cet état à l'intérieur du premier sous-ensemble 27, par exemple en bloquant provisoirement la butée 38 sur la tige 32, on règle l'entraxe entre les deux pièces d'articulation 29, 34 à ladite longueur prédéterminée L et on fixe, ici par soudure 50, ladite seconde butée 38 au boítier 26, dans cette position. Comme représenté, la butée 38 présente une épaisseur suffisante pour venir s'adapter dans une portion d'extrémité 52 à surface cylindrique dudit boítier.To do this, when assembling the two sub-assemblies, we compress the springs with contiguous turns in bringing the two stops 36, 38 as close as possible (FIG. 4) then, we places the second subset 30 in this state inside the first subset 27, for example by temporarily blocking the stop 38 on the rod 32, the center distance between the two is adjusted articulation pieces 29, 34 at said predetermined length L and here fixed by welding 50, said second stop 38 to the housing 26, in this position. As shown, the stop 38 has sufficient thickness to fit in a portion end 52 with cylindrical surface of said housing.

Selon le premier mode d'exécution, ladite première butée 36 est préfixée, ici par soudage, à l'extrémité de la tige 32. Dans l'exemple de la figure 5, l'extrémité de la butée et l'extrémité du boítier sont à affleurement, c'est-à-dire à la même distance dl de l'axe z-z. Cette situation optimale n'est pas toujours réalisée. Ainsi, dans le cas de la figure 6, la butée 52 est plus proche (distance d2) de l'axe z-z que l'extrémité du boítier, tandis que dans le cas de la figure 7, la butée 52 est plus éloignée (distance d3) de l'axe z-z que l'extrémité du boítier. C'est cette possibilité de décalage axial entre la butée et l'extrémité du boítier qui permet, sans nuire à la soudure, de toujours ajuster l'entraxe entre les deux pièces d'articulation 29, 34 à la valeur L souhaitée.According to the first embodiment, said first stop 36 is prefixed, here by welding, to the end of the rod 32. In the example of figure 5, the end of the stop and the end of the housing are flush, that is to say at the same distance dl from the z-z axis. This optimal situation is not always carried out. Thus, in the case of FIG. 6, the stop 52 is more close (distance d2) to the axis z-z as the end of the case, while in the case of FIG. 7, the stop 52 is more distant (distance d3) from the z-z axis as the end of the housing. It is this possibility of axial offset between the stop and the end of the housing which allows, without damaging the weld, to always adjust the distance between the two articulation parts 29, 34 at the desired L value.

Les figures 8 et 9 montrent une variante permettant de mieux maítriser encore les opérations d'assemblage et de réglage.Figures 8 and 9 show a variant allowing better still master the assembly and adjustment operations.

En effet, selon cette variante, la première butée 36 est solidarisée à la tige 32 pendant les opérations d'assemblage et de réglage du second sous-ensemble 30. Plus précisément, on maintient la seconde butée 38 à une distance do prédéterminée de la seconde pièce d'articulation 34. On comprime le ressort à spires jointives en faisant coulisser la première butée 36 sur la tige en direction de la seconde butée et on fixe par soudure 55 ladite première butée à la tige. On est alors ramené au cas précédent qui consiste à engager le second sous-ensemble comprimé dans le boítier et à fixer par soudure 50 la seconde butée 38 au boítier 26 après avoir réglé l'entraxe des deux pièces d'articulation à la longueur L prédéterminée.According to this variant, the first stop 36 is secured to the rod 32 during assembly and adjustment of the second sub-assembly 30. More precisely, it maintains the second stop 38 at a predetermined distance do from the second articulation piece 34. The spring is compressed with contiguous turns by sliding the first stop 36 on the rod in the direction of the second stop and said first 55 is fixed by welding stop on the rod. We are then brought back to the previous case which consists to engage the second compressed sub-assembly in the housing and to fix by welding 50 the second stop 38 to the housing 26 after having set the distance between the two articulation pieces to length L predetermined.

Bien entendu, le boítier 26 peut avoir une autre forme et comporter un fourreau partout à solidarisation la première pièce d'articulation.Of course, the housing 26 may have another shape and have a sheath everywhere to secure the first part of articulation.

La seconde butée 38 est alors soudé à l'extrémité libre du fourreau apposée à la première pièce d'articulation 29.The second stop 38 is then welded to the free end of the sheath affixed to the first articulation part 29.

Claims (4)

  1. A method for the assembly and adjustment of elements of an elastic damping device (15) for a double damping flywheel, such devices being adapted to be attached and articulated between two rotating masses (12, 13), being oriented generally radially, each device having for this purpose an articulation axis (y-y, z-z) at each of its ends. each elastic device (15) comprising a first sub-assembly (27) defining an elongate housing which includes a first articulating member (29), and a second sub-assembly (30) including at least one helical spring (25a, 25b) which is mounted on a rod (32) furnished with a second articulating member (34), and the said spring being engaged between a first abutment (35) situated at one end of the said rod and a second abutment (38) fixed to one end of the said housing after the two sub-assemblies have been assembled together, characterised in that it consists in compressing the said spring (25a, 25b) by the maximum amount so as to bring its turns into mutual contact, placing the said second sub-assembly (30) inside the first one in this state, adjusting the elastic device to a predetermined length (L) between the axes of the two articulating members (29, 34) whereby to elongate it by the maximum possible amount, and fixing (50) the said second abutment (38) to the said housing (26) in that position.
  2. A method according to Claim 1, characterised in that, the said first abutment (36) being fixed beforehand to the corresponding end of the said rod, it consists, after the said spring is compressed into mutual engagement of its turns, in positioning the two sub-assemblies one inside the other and adjusting the said predetermined length (L) before fixing the said second abutment (38) to an end portion of the said housing, into which it adapts itself.
  3. A method according to Claim 1, characterised in that it consists in maintaining the said second abutment (38) at a predetermined distance (do) from the said second articulating member, compressing the said spring into mutual engagement of the turns by causing the said first abutment (36) to slide on the said rod (32) towards the said second abutment, and fixing (55) the said first abutment (36) to the said rod before fixing the said second abutment (36) to the said housing.
  4. A method according to one of the preceding Claims, characterised in that the said first and/or second abutment is fixed by welding.
EP19970109495 1996-06-14 1997-06-11 Mounting method and adjustment of elements of an elastic damping unit Expired - Lifetime EP0813000B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9607436A FR2749902B1 (en) 1996-06-14 1996-06-14 METHOD FOR ASSEMBLING AND ADJUSTING THE ELEMENTS OF AN ELASTIC DAMPING DEVICE
FR9607436 1996-06-14

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EP0813000A1 EP0813000A1 (en) 1997-12-17
EP0813000B1 true EP0813000B1 (en) 2001-10-24

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DE (1) DE69716348T2 (en)
FR (1) FR2749902B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762060B1 (en) * 1997-03-25 1999-05-14 Valeo FRICTION CLUTCH WITH WEAR RETRACTING DEVICE, ESPECIALLY FOR A MOTOR VEHICLE
FR2769062B1 (en) * 1997-09-30 2001-12-14 Valeo ELASTIC DAMPING DEVICE, PARTICULARLY FOR A DOUBLE SHOCK ABSORBER, AND A DOUBLE SHOCK ABSORBER EQUIPPED WITH SUCH A DEVICE
DE102009010126A1 (en) 2008-03-03 2009-09-10 Luk Lamellen Und Kupplungsbau Beteiligungs Kg torsional vibration dampers
DE102012218926B4 (en) 2012-10-17 2021-01-14 Zf Friedrichshafen Ag Torsional vibration damping arrangement with preload
DE102012218924A1 (en) * 2012-10-17 2014-04-17 Zf Friedrichshafen Ag Torsional vibration damping arrangement with speed-dependent stiffness
DE102012218923A1 (en) * 2012-10-17 2014-04-17 Zf Friedrichshafen Ag Torsional vibration damping arrangement with vibration damping

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718813B1 (en) * 1994-04-14 1996-07-12 Valeo Shock absorber flywheel, especially for a motor vehicle.
SE501308C2 (en) * 1993-05-19 1995-01-09 Saab Scania Ab Dual Mass Flywheel
FR2718814B1 (en) * 1994-04-14 1996-07-12 Valeo Shock absorber flywheel, especially for a motor vehicle.
FR2718806B1 (en) * 1994-04-14 1996-07-12 Valeo Reaction plate for friction clutch, in particular for motor vehicle.

Also Published As

Publication number Publication date
FR2749902A1 (en) 1997-12-19
DE69716348T2 (en) 2003-11-06
DE69716348D1 (en) 2002-11-21
FR2749902B1 (en) 2001-12-07
EP0813000A1 (en) 1997-12-17

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